Telephone-mouthpiece sanitary cap



TELEPHONE MOUTHPIECE SAVNITARY CAP Filed Sept. 30, 1927 INvENToR 2 Patented May `29, 1928.

UNITED. s'rATas PATENT ,oFFlcE.

' ROBERT IUALPINE, 0F ST. HARYS, ONTARIO, CANADA. l TELEPHONE-HOUTHPIECE SANITARY CAP.

Application filed September 30, 1927. Serial No. 223,055.

This invention relates to a tele hone mouthpiece sanitary cap, as described'in the present specication and 1l'lustrated 1n the accompanying drawings which form part of the same.

The invention consists essentially of the nov'el features'pointed out 'broadly and s pecifically in the claims for novelty following a description containing an explanation 1n detail of an acceptable form of the invention.

The objects of the invention are to provide sanitary caps of simple constructlon and that can be easily and quickly fastened upon and removed from a telephone mouthpiece; to produce such a cap so cheap] as to be Within the reach of the whole pu llc, therefore encouraging the use of such sanitary and disease-preventing devices; and generally, to improve upon such known devices.

In the drawings, Figure 1 is a ltop plan view of a device made according to this invention.

Figure 2 is a section on line 2-2 ure 1.

Figure 3 is an elevation of Figure 1.

Figure 4 is a top plan view of another form of the invention wherein other means are used for fastening the device upon the mouthpiece. l

Figure 5 is an elevation of Figure 4.

Figure 6 is a bottom plan view of Figure 4.

Figure 7 is a section on line 7 7 in Figure 4, illustratingthe working of the fastening means by giving the representation of a hand in the act of fastening the device upon the mouthpiece.

Figure 8 illustrates the device as applied to the mouthpiece and ready for use.

Referrin to the drawings, 10 is a circular disc o? relatively stiff paper or other suitable pulp substance, having a centrall located opening and formed into a su stantially cup-like shape by turning the edge to provlde a flange 11; the flange is provided with a number of spaced slits 12 cut thereinto so as to present a serrated or expansible flange, thus permitting any portion of the flange to Ybe expanded or bent out of its normal position or shape without affecting the remaining portion of said flange. The fiange is turned in suiciently to leave the inner diameter D'smaller than the diameter D1 of the telephone mouthpiece s'o that in Figthe flange, by embracing the outer rim portion of the mouthpiece, serves the means of retaining the device in operative position upon the mouthpiece.

14 is a second discof relatively soft porous paper, preferably tissue papel', oi a diameter larger than the .inside diameter D3 of the disc 10, so that by applying the disc 14 upon the inside face otl the disclO, as

' shown, the edge of the disc will curl or bend,

forming a flange 12A engaging the flange 11. The inside disc 14 is thus retained in position by friction securely enough to make the device complete a practica-l one for the purposes intended thereof.

In Figures 4 to 7, a slight modification in the form of the invention is disclosed. The flange 11A is bent substantially at right angles and is extended at a number of points to provide lugs 20. The lugs are turned in as shown and are made long enough to engage the outer rim of the mouthpiece when the device is pushed into position, as best illustrated in Figure 7. As also suggested by Figures 7 and 8, the relative length of the flange 11A and the lugs 20 is made such that once the device is upon the mouthpiece (as shown in Figure 8) the lugs are free to spring back into their normal position and therefore form the means of holding the device in operative position upon the mouthpiece. The lugs 2() assist in retaining the disc 14 on the member 10 should said disc move from its intended assembled position relative to said member.

The tissue'paper 14 should vibrate suiicientliy)7 to properly transmit sounds, and it is to e noted that by leaving the disc free except at its edges, the vibrating properties of this disc are increased. If it is desired, the disc 14 may be secured to the member 11 by glueing one to the other at a few separated points along the flange 12A.

Operation: In applying the device made to the form shown in Figures 1 to 3, it is gras ed preferably between the thumb and the rst linger and held at an angle to the vert-ical. The device is then tirst made to engage the upper or lower portion of the mouthpiece rim so as to expand locally one part of the flange 11, and the device then swung to a vertical position to cause the remaining portion of the flange 11 to engage -the remaining portion of the mouthpiece rim. In applying the device made to the form shown in Figures 4 to 6, the device is grasped preferably between the thumb and first finger and pushed onto the mouthplece, as clearly suggested in Figure 7.

After the telephone conversation has been completed, the deviceJ is thrown away, since its relatively small cost easily permits of.. so f doing.

What I claim is:

1. ln a 'telephone mouthpiece sanitary cap, a circular perforated dise havingI a Hange therearound, and a second dise of relatively soft paper laid upon said first-mentioned dise and made to a diameter larger than that of said dise an'dhaving the edge turned to frctionall engage the flange in said first-mentioned isc.

2. A telephone mouthpiece sanitary cap comprisin a cup-shape member of relatively sti paper having an opening therethrough and a flange adapted to embrace the outer rim portion of said mouthpiece and retain said member thereupon, and a dise of tissue paper laid, upon. said member and bent along the edge to form a flange engaging said first-mentioned flange.

Signed at the city of Toronto, this 1st day of September, 1927. y

ROBERT MCALPINE. 

